I've experienced similar working in a halfway house (It was the only job in that small town that'd hire.)

He was living there and out of jail. And he was just absolutely unstable. People on /x/ have never encountered real schizophrenia and think it's something from the movies where you'll be sitting there alone at night and the camera zooms in really fast and you start hearing voices dramatically. The guy was on the edge of panic at all times and because of it caught the attention of everyone around him just asking if he was ok or if anything was wrong. And because of that he thought everyone was in league with each other to fuck with him. I told him this outright and he stopped for a second, looked around, looked at me, and ran off to his room and wouldn't come out until the next day.

His handwriting would change styles and become completely unreadable and that's how everyone that interacted with him knew he wasn't taking his meds. It was genuinely hard to see someone like that where you know he won't be cured, won't figure out what is and isn't real, and generally won't find any real amount of peace as long as he lives. Made me really consider all the joking about schizos for a minute.